255891087 has 12 divisors (see below), whose sum is σ = 369762744. Its totient is φ = 170528400.

The previous prime is 255891079. The next prime is 255891091. The reversal of 255891087 is 780198552.

It is a happy number.

255891087 is a `hidden beast` number, since 2 + 558 + 9 + 10 + 87 = 666.

255891087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255891087 - 2³ = 255891079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255891007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34837 + ... + 41537.

It is an arithmetic number, because the mean of its divisors is an integer number (30813562).

Almost surely, 2^255891087 is an apocalyptic number.

255891087 is a deficient number, since it is larger than the sum of its proper divisors (113871657).

255891087 is a wasteful number, since it uses less digits than its factorization.

255891087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10950 (or 10947 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 255891087 is about 15996.5961066722. The cubic root of 255891087 is about 634.8703618630.

The spelling of 255891087 in words is "two hundred fifty-five million, eight hundred ninety-one thousand, eighty-seven".